OregonFlora species comparison

nodes slightly compressed, 2–5 exserted; the uppermost node in upper 25–50% of culm.

retrorsely scabrous.

intraor extravaginal or mostly extravaginal.

extravaginal.

sheaths closed to 20% of their length, bases of basal sheaths glabrous;

ligules 0.2– 0.8(1)mm long, truncate;

blades mostly flat, 0.8–3 mm wide.

sheaths closed 25–50% of their length, retrorsely scabrous;

ligules 2–3.5 mm;

blades flat, 3–8 mm wide.

narrowly lanceoloid to ovoid, generally 25–40% as broad as long at maturity; erect, or nodding in shade forms, sparsely to moderately congested, 7–16(20) cm long;

branches ascending to widely spreading, 2–5 per node, fairly straight.

open; sparse, 14–30 cm;

branches widely spreading, fairly straight; (5.5)8–12(15)cm, 1–3(4) per node, antrorsely scabrous, with 3–13 spikelets.

narrowly lanceolate to lanceolate; to 2.5–3.5 times as long as wide, 3–8 mm, usually not glaucous;

florets (1)2–5;

rachilla internodes mostly less than 1 mm.

4–8 mm;

florets 2–4;

rachilla internodes about 1 mm long.

tapering from the base or narrowly lanceolate;

keels smooth or sparsely scabrous;

lower glumes 3-veined, 6.4–11 times as long as wide;

upper glumes shorter than or subequal to lowest lemma.

keels scabrous;

lower glumes lanceolate, 3-veined but margins tending to roll up, often concealing the marginal veins and appearing 1-veined;

upper glumes shorter than or subequal to the lowest lemma.

with sparse, often short; cobwebby hairs.

with cobwebby hairs.

narrowly lanceolate to lanceolate, 2.4–4 mm; lower lemmas less than 20% as wide as long, distinctly keeled;

keels and marginal veins short-villous, intermediate veins glabrous; area between veins smooth or muriculate, glabrous;

tips acute, usually bronzecolored in part.

lanceolate, 3.2–6 mm, distinctly keeled; smooth or sparsely finely scabrous;

keels longvillous to 67–75% of their length; marginal vein hairs sparse, intermediate veins usually glabrous, rarely sparsely puberulent, glabrous between the veins;

tips acute.

0.8–1.9 mm.

0.5–1.1 mm.

=28, 42.